Analyzing the Impeller Eye
This is a follow-up to my column on predicting centrifugal pump performance (Pump & Systems, May 2011), and offers equations that will enable the engineer to perform a partial analysis of the...
Centrifugal Pump Axial Thrust
The late Charlie Jackson, vibration expert at Monsanto, once told me that he was unaware of any centrifugal pump manufacturer that knew how to calculate the hydraulic axial thrust produced within the...
Centrifugal Pump Hydraulics by the Numbers: Radial Thrust
This article is the first of three on centrifugal pump radial thrust. It relates the author’s experience with the use of the traditional equation to calculate radial thrust, subsequent measurements...
Centrifugal Pump Specific Speed
Specific speed is a concept developed for water turbines in 1915, which was later applied to centrifugal pumps (Stepanoff, 1948). Specific speed is a way to “normalize” the performance of these...
Power Pump Myths
Dispelling common misconceptions about reciprocating power pumps
The Function of the Volute
Misunderstood pump element serves to minimize mixing lossIt is a common misconception in the U.S. pump industry that the function of the volute is that of a diffuser: to convert velocity into...